import time as t
scale=10
print("------执行开始------")
for i in range(scale+1):
    a='*'*i
    b='.'*(scale-i)
    c=(i/scale)*100
    print("\r{:^3.0f}%[{}->{}]".format(c,a,b),end='')
    t.sleep(0.1)
print("------执行结束------")